Utility knife



FIG. 1 is a perspective view of a utility knife showing our new design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a left side view; and,

FIG. 8 is a perspective view thereof, with the blade in an extended position. 

The ornamental design for a utility knife, as shown. 